:root {
  --ink: #10211d;
  --ink-2: #17332d;
  --gold: #c8a76d;
  --gold-2: #e4d3ae;
  --paper: #f7f3ea;
  --warm: #fffaf0;
  --muted: #65756f;
  --line: rgba(16, 33, 29, .12);
  --shadow: 0 22px 55px rgba(10, 24, 21, .16);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: "Noto Sans SC", "Microsoft YaHei", Arial, sans-serif;
  color: var(--ink);
  background: var(--paper);
}
a { color: inherit; text-decoration: none; }
img { display: block; width: 100%; }

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px clamp(22px, 5vw, 72px);
  color: #fff;
  transition: background .25s ease, box-shadow .25s ease, padding .25s ease;
}
.site-header.is-scrolled {
  background: rgba(16, 33, 29, .92);
  box-shadow: 0 12px 35px rgba(0,0,0,.16);
  backdrop-filter: blur(16px);
  padding-top: 12px;
  padding-bottom: 12px;
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
}
.brand-mark {
  width: 42px;
  height: 42px;
  display: grid;
  place-items: center;
  border: 1px solid rgba(228, 211, 174, .65);
  background: rgba(255,255,255,.08);
  color: var(--gold-2);
  font-weight: 800;
  letter-spacing: 0;
}
.brand-logo-mark {
  width: 46px;
  height: 42px;
  padding: 4px;
}
.brand-logo-mark img {
  width: 100%;
  height: 100%;
  object-fit: contain;
}
.brand strong { display: block; font-size: 18px; letter-spacing: 0; }
.brand em { display: block; font-size: 11px; font-style: normal; opacity: .78; margin-top: 2px; }
.desktop-nav { display: flex; align-items: center; gap: 28px; font-size: 14px; }
.desktop-nav a { opacity: .86; }
.desktop-nav a:hover { color: var(--gold-2); opacity: 1; }
.menu-button {
  display: none;
  width: 44px;
  height: 44px;
  border: 1px solid rgba(255,255,255,.24);
  background: rgba(255,255,255,.08);
}
.menu-button span {
  display: block;
  width: 20px;
  height: 2px;
  margin: 5px auto;
  background: #fff;
}
.mobile-nav {
  position: fixed;
  top: 70px;
  left: 16px;
  right: 16px;
  z-index: 18;
  display: none;
  grid-template-columns: 1fr;
  background: rgba(16,33,29,.96);
  color: #fff;
  padding: 12px;
  box-shadow: var(--shadow);
}
.mobile-nav.is-open { display: grid; }
.mobile-nav a { padding: 14px 12px; border-bottom: 1px solid rgba(255,255,255,.1); }

.hero {
  min-height: 96vh;
  position: relative;
  display: grid;
  align-items: center;
  padding: 140px clamp(22px, 6vw, 86px) 86px;
  color: #fff;
  overflow: hidden;
}
.hero-media {
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, rgba(8,24,22,.96), rgba(8,24,22,.6), rgba(8,24,22,.28)), url("assets/hero-brand-matrix.jpg") center / cover no-repeat;
  transform: scale(1.02);
}
.hero::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 130px;
  background: linear-gradient(180deg, transparent, var(--paper));
}
.hero-content {
  position: relative;
  z-index: 2;
  max-width: 760px;
}
.eyebrow {
  margin: 0 0 14px;
  color: var(--gold);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: .12em;
  text-transform: uppercase;
}
h1, h2, h3, p { margin-top: 0; }
h1 {
  margin-bottom: 24px;
  font-size: clamp(48px, 8vw, 96px);
  line-height: 1.02;
  letter-spacing: 0;
}
.hero-copy {
  max-width: 620px;
  color: rgba(255,255,255,.82);
  font-size: clamp(18px, 2.2vw, 24px);
  line-height: 1.8;
}
.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 34px;
}
.primary-link, .secondary-link, .audience-grid a {
  min-height: 46px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0 22px;
  font-weight: 700;
}
.primary-link { background: var(--gold); color: #15241f; }
.secondary-link { border: 1px solid rgba(255,255,255,.34); color: #fff; }
.hero-panel {
  position: absolute;
  z-index: 3;
  right: clamp(22px, 6vw, 86px);
  bottom: 56px;
  width: min(420px, calc(100% - 44px));
  display: grid;
  gap: 1px;
  background: rgba(255,255,255,.16);
  border: 1px solid rgba(255,255,255,.18);
  backdrop-filter: blur(18px);
}
.hero-panel div { padding: 18px 20px; background: rgba(16,33,29,.48); }
.hero-panel span { display: block; color: var(--gold-2); font-size: 12px; margin-bottom: 6px; }
.hero-panel strong { font-size: 17px; }

.section {
  padding: clamp(72px, 8vw, 118px) clamp(22px, 6vw, 86px);
}
.section-head {
  max-width: 980px;
  margin-bottom: 42px;
}
.section-head.narrow { max-width: 720px; text-align: center; margin-inline: auto; }
.section h2 {
  font-size: clamp(32px, 4.4vw, 58px);
  line-height: 1.15;
  margin-bottom: 18px;
}
.section-head p:not(.eyebrow), .intro-grid p, .capability-grid p, .audience-grid p, .timeline p, .contact-card p {
  color: var(--muted);
  line-height: 1.85;
  font-size: 16px;
}
.intro-band { padding-top: 76px; }
.intro-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 28px;
  max-width: 1060px;
}
.intro-copy {
  display: grid;
  gap: 18px;
}
.intro-copy p {
  font-size: 19px;
  color: #31433e;
  margin: 0;
  line-height: 1.9;
}
.intro-highlights {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 12px;
}
.intro-highlights span {
  padding: 10px 14px;
  border: 1px solid rgba(200, 167, 109, .35);
  background: rgba(255,255,255,.48);
  color: var(--ink);
  font-weight: 700;
  font-size: 14px;
}

.capability-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}
.capability-grid article {
  min-height: 230px;
  padding: 28px;
  border: 1px solid var(--line);
  background: rgba(255,255,255,.58);
}
.capability-grid span, .timeline span {
  display: inline-block;
  color: var(--gold);
  font-weight: 800;
  margin-bottom: 24px;
}
.capability-grid h3 { font-size: 21px; margin-bottom: 12px; }

.dark-section {
  background: var(--ink);
  color: #fff;
}
.dark-section .section-head p:not(.eyebrow) { color: rgba(255,255,255,.68); }
.brand-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 18px;
}
.brand-grid-three {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}
.brand-card {
  position: relative;
  min-height: 520px;
  overflow: hidden;
  background: #0d1a17;
}
.brand-card.large { grid-column: span 2; }
.brand-card img {
  height: 100%;
  min-height: 520px;
  object-fit: cover;
  opacity: .72;
  transition: transform .5s ease, opacity .5s ease;
}
.brand-card:hover img { transform: scale(1.04); opacity: .9; }
.brand-card::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(5,13,12,.04), rgba(5,13,12,.88));
}
.brand-card div {
  position: absolute;
  left: 24px;
  right: 24px;
  bottom: 24px;
  z-index: 2;
}
.brand-card p {
  color: var(--gold-2);
  font-size: 13px;
  font-weight: 700;
  margin-bottom: 8px;
}
.brand-card h3 { font-size: 30px; margin-bottom: 12px; }
.brand-card span { color: rgba(255,255,255,.76); line-height: 1.8; }
.brand-detail-link {
  display: inline-flex;
  align-items: center;
  margin-top: 14px;
  color: var(--gold-2);
  font-size: 14px;
  font-weight: 800;
}

.audience-section { background: var(--warm); }
.audience-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 20px;
}
.audience-grid article {
  padding: 34px;
  background: #fff;
  border: 1px solid rgba(200,167,109,.22);
  box-shadow: 0 14px 38px rgba(16,33,29,.08);
}
.audience-grid h3 { font-size: 25px; }
.audience-grid a {
  margin-top: 12px;
  background: var(--ink);
  color: #fff;
}

.timeline {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  border-top: 1px solid var(--line);
  border-left: 1px solid var(--line);
}
.timeline div {
  padding: 30px;
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background: rgba(255,255,255,.4);
}
.timeline strong { display: block; font-size: 22px; margin-bottom: 12px; }

.contact-section { padding-top: 30px; }
.contact-card {
  display: grid;
  grid-template-columns: minmax(280px, .8fr) minmax(360px, 1.2fr);
  gap: 42px;
  padding: clamp(30px, 5vw, 56px);
  background: var(--ink);
  color: #fff;
  box-shadow: var(--shadow);
}
.contact-card p { color: rgba(255,255,255,.72); }
.contact-info {
  display: grid;
  gap: 12px;
  margin-top: 28px;
}
.contact-info p {
  margin: 0;
  padding: 14px 16px;
  border-left: 3px solid var(--gold);
  background: rgba(255,255,255,.06);
}
.contact-info span {
  display: block;
  color: rgba(255,255,255,.58);
  font-size: 13px;
  margin-bottom: 4px;
}
.contact-info strong {
  color: #fff;
  font-size: 18px;
  line-height: 1.5;
}
.contact-form {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
}
.contact-form label { display: grid; gap: 8px; color: rgba(255,255,255,.72); font-size: 14px; }
.contact-form .full { grid-column: 1 / -1; }
.contact-form input, .contact-form select, .contact-form textarea {
  width: 100%;
  border: 1px solid rgba(255,255,255,.18);
  background: rgba(255,255,255,.08);
  color: #fff;
  padding: 13px 14px;
  font: inherit;
  outline: none;
}
.contact-form select option { color: var(--ink); }
.contact-form textarea { resize: vertical; }
.contact-form button {
  grid-column: 1 / -1;
  border: 0;
  background: var(--gold);
  color: var(--ink);
  min-height: 50px;
  font-weight: 800;
  cursor: pointer;
}

.site-footer {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 20px;
  padding: 36px clamp(22px, 6vw, 86px);
  background: #091512;
  color: #fff;
}
.site-footer p { margin: 6px 0 0; color: rgba(255,255,255,.62); }
.footer-logo {
  width: 180px;
  max-width: 100%;
  margin-bottom: 8px;
}
.footer-links { display: flex; gap: 18px; align-items: center; color: rgba(255,255,255,.74); }
.footer-note { grid-column: 1 / -1; font-size: 13px; }
.footer-note a { color: rgba(255,255,255,.74); margin-left: 10px; }
.footer-note a:hover { color: var(--gold-2); }

.brand-page {
  background: var(--paper);
  padding-top: 78px;
}
.brand-hero {
  min-height: 560px;
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(360px, .8fr);
  align-items: stretch;
  background: var(--ink);
  color: #fff;
}
.brand-hero img {
  height: 100%;
  min-height: 560px;
  object-fit: cover;
}
.brand-hero div {
  display: grid;
  align-content: center;
  padding: clamp(36px, 6vw, 82px);
}
.brand-hero h1 {
  font-size: clamp(48px, 7vw, 86px);
}
.brand-hero p:not(.eyebrow) {
  color: rgba(255,255,255,.76);
  font-size: 18px;
  line-height: 1.9;
}
.brand-content {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 20px;
  padding: clamp(56px, 7vw, 92px) clamp(22px, 6vw, 86px);
}
.brand-content article {
  padding: 30px;
  background: #fff;
  border: 1px solid var(--line);
}
.brand-content h2 {
  font-size: 24px;
  margin-bottom: 14px;
}
.brand-content p {
  color: var(--muted);
  line-height: 1.85;
}
.brand-cta {
  margin: 0 clamp(22px, 6vw, 86px) clamp(56px, 7vw, 92px);
  padding: clamp(30px, 5vw, 52px);
  background: var(--ink);
  color: #fff;
}
.brand-cta p {
  color: rgba(255,255,255,.72);
  line-height: 1.8;
}
.brand-footer {
  padding: 26px clamp(22px, 6vw, 86px);
  background: #091512;
  color: rgba(255,255,255,.62);
  font-size: 13px;
}
.brand-footer p { margin: 0; }
.brand-footer a { color: rgba(255,255,255,.74); }
.brand-footer a:hover { color: var(--gold-2); }

@media (max-width: 1080px) {
  .brand-grid, .brand-grid-three { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .capability-grid, .audience-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .timeline { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (max-width: 760px) {
  .desktop-nav { display: none; }
  .menu-button { display: block; }
  .site-header {
    padding-left: 16px;
    padding-right: 16px;
  }
  .brand { gap: 9px; min-width: 0; }
  .brand strong { font-size: 15px; }
  .brand em { font-size: 9px; }
  .brand-logo-mark {
    width: 38px;
    height: 38px;
    flex: 0 0 38px;
  }
  .hero { min-height: 100vh; padding-top: 112px; padding-bottom: 250px; }
  h1 { font-size: clamp(42px, 14vw, 62px); }
  .hero-copy { font-size: 17px; line-height: 1.75; }
  .hero-panel { left: 22px; right: 22px; bottom: 38px; width: auto; }
  .intro-grid, .contact-card, .site-footer { grid-template-columns: 1fr; }
  .capability-grid, .audience-grid, .timeline, .brand-grid, .brand-grid-three { grid-template-columns: 1fr; }
  .brand-card.large { grid-column: auto; }
  .brand-card, .brand-card img { min-height: 430px; }
  .section { padding-left: 20px; padding-right: 20px; }
  .section h2 { font-size: clamp(30px, 10vw, 42px); }
  .intro-copy p { font-size: 17px; }
  .capability-grid article, .audience-grid article { padding: 24px; }
  .contact-form { grid-template-columns: 1fr; }
  .footer-links { flex-wrap: wrap; }
  .brand-page { padding-top: 68px; }
  .brand-hero {
    grid-template-columns: 1fr;
    min-height: auto;
  }
  .brand-hero img {
    min-height: 320px;
    height: 320px;
  }
  .brand-hero div {
    padding: 34px 22px 44px;
  }
  .brand-hero h1 {
    font-size: 46px;
    margin-bottom: 16px;
  }
  .brand-content {
    grid-template-columns: 1fr;
    padding: 42px 20px;
  }
  .brand-cta {
    margin: 0 20px 46px;
  }
}